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Re: [PATCH] Missing Skylake -march=/-mtune= option
- From: Markus Trippelsdorf <markus at trippelsdorf dot de>
- To: Yuri Rumyantsev <ysrumyan at gmail dot com>
- Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Uros Bizjak <ubizjak at gmail dot com>, Igor Zamyatin <izamyatin at gmail dot com>, ÐÐÑÑ ÐÐÐÐÐÐÑ <enkovich dot gnu at gmail dot com>
- Date: Sun, 23 Aug 2015 12:54:20 +0200
- Subject: Re: [PATCH] Missing Skylake -march=/-mtune= option
- Authentication-results: sourceware.org; auth=none
- References: <CAEoMCqSAJ1P8XwVAe0w4=+HsnPyShD-kSpbsxHxgBMjFS7UtDw at mail dot gmail dot com> <20150820154923 dot GA399 at x4>
On 2015.08.20 at 17:49 +0200, Markus Trippelsdorf wrote:
> On 2015.08.13 at 12:31 +0300, Yuri Rumyantsev wrote:
> > Hi All,
> >
> > Here is patch for adding march/mtune options for Skylake.
>
> http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/desktop-6th-gen-core-family-spec-update.pdf
>
> states that BMI1 and BMI2 are not supported. Is this true for all
> Skylake CPUs?
According to https://software.intel.com/en-us/forums/topic/584240
this only affects Skylake Pentium/Celeron processors, that incorrectly
report that BMI is present.
So this is not an issue in general.
--
Markus